/*
 * Copyright (c) 2008-2010, JFXtras Group
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 3. Neither the name of JFXtras nor the names of its contributors may be used
 *    to endorse or promote products derived from this software without
 *    specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
package org.jfxtras.lang;

import java.lang.StringBuilder;

/**
 * Simple wrapper around an Object sequence to allow nesting of sequences
 * without flattening.
 * <p>
 * Also overrides toString with a clean representation for printing out sequence
 * items.
 *
@example
def sequences = [
    XSeq {seq: ["a", "b", "c"]}
    XSeq {seq: ["1", "2", "3"]}
];
for (xs in sequences) {
    println(xs.seq);
}
@endexample
 * @author Stephen Chin
 */
public class XSeq {
    /** The nested sequence object */
    public var seq:Object[];

    override function toString() {
        def sb = StringBuilder {}
        sb.append("[");
        for (s in seq) {
            if (indexof s != 0) {
                sb.append(", ")
            }
            if (not (s instanceof java.lang.Number)) {
                sb.append("\"");
            }
            sb.append(s);
            if (not (s instanceof java.lang.Number)) {
                sb.append("\"");
            }
        }
        sb.append("]");
        return sb.toString();
    }
}
